Doorlock



May 4' 1926; 1,583,079

. w. A. LURI;

- DOORLOCK Filed April 12. 1924 2 SheeEs-Sheei: 1

'gzzw ime;

May 4' 1926.

W. A. LURIE DOORLOCK Filed April 1 1924 2 Sheets-Sheet 2 ZZZ.

Patented May 4, 1926. i

, 1,583,019 UNITED'STATESO PATENT OFFICE.

WILLIAM A. LURIE, OF NEW ORLEANS, LOUISIANA.

DOOR/LOCK.

Application filed April 12,

To all whom it may concern: Be it known that I, WILLIAM A. Loam, a citizen of the United States, and a resident of New Orleans, in the parish of Orleans and State of Louisiana, have invented certain new and useful Improvements in Doorlocks, of which the following is a specification.

My invention relates to door locks of the type disclosed in my Patent No. 1,352,010, September 7, 1920, in which a singlemember acts as a spring latch and also a locking bolt.

Among the important objects of the invention are to provide improved construetion which will prevent the conical head of the locking boltto normally protrude .be yond the escutcheon plate of the look so as to eliminate all projections which might catch the clothes; to provide a recess 1n the lock escutcheon plate for normally conceal 'ing the conical bolt head, and to extend the bolt head keeper from the strike plate and to so shape the keeper that it will fit into the lock recess to cooperate therewith to relieve the locking bolt of weight and to assist in supporting the doorwhen it is closed; to provide improved arrangement of the lock parts to give them more individual space and permit better and more efficient cooperation thereof; and in general to simplify the construction and arrangement of the various parts so that the lock will be more practical and more efliciently perform the service required. I e

On the accompanying drawing, my 1m proved construction and arrangement are clearly illustrated.

On the drawing, a p Fig. l is a side elevational view of the lock structure with the closure plate of the lock casing removed and other parts broken awayto more clearly show the construction and operation,

Fig. 2 is a sectional view on plane 2-2, Fi 1 Fig. 3 is a sectional view on plane 3-3, Fig. 1, and

- Fig. 4 is a sectional view on plane 44, Fig. 1. The lock comprises the rectangular shal low box or container 10, which is closed at its outer end by the escutcheon plate 11 and which has the side closure plate 12 which is detachable. Posts 13 extending from the opposite side wall 12 of the lock serve to receive screws 14 which hold the closure 1924. Serial No. 705,984.

plate in place. The escutcheon plate 11 is deflected inwardly to form the rectangular recess or pocket 15 from whose inner wall 16 extends the sleeve 17- through which passes the shank 18 of the locking bolt. At

the outer end of the shank is the bolt head 19 i which is conical with its base to the outside,

and which head is normally held within the recess 15 by the force of a compression spring 20 which engages around the shank between the sleeve 17 and the abutment block 21 secured to the inner end of the shank. Adjacent to the block 21 the cover 12 and the opposite wall of the lock casing have the openings 22 and 23 for journaling the outer flanges 24 and 25 on the cam hubs 26 andv 27, the hub 26 having the inner flange 28 receiving the projection 29 on the hub 27 These hubs have registering polygonal passageways 30 and 31 for receiving respectively the polygonalspindles 3 2 and 33 which at their outer ends have secured thereto the knobs 34 and 35 respectively. The spindle 33 hasv the threaded extension 36 which threads into the spindle 32 so that the spindles may be relatively rotated to rotate respectively the hubs 26. and 27.

Extending from the hub 26 is the cam. plate 37 and extending from the hub 27 is the cam plate 38, the outer edges ofthese cam plates,

being parallel with the abutment block 21 and engaging full length against such block when the lock'parts are in normal position with the lock bolt in. When either or both door knobs are turned the respective cam plates will be rotated to exert outward pressure against the abutment block 21 to force l ,the lock boltoutwardly.

The lock casing is inserted in the open ing' 39 provided in the door 40 and the escutcheon plate is set in the recess 41 to be flush along its outer surface with the inner edge of the door. The escutcheon plates 42 and 43 secured against the inner and outer sldes of the door respectively have the open ings 44 and 45 through which the respective door knob spindles pass.

Turning of the outer door knob 35 and consequently outward movement of the looking bolt is normally prevented by the detent lever 46 whose end 6 engages in the notch 47 provided in the hub 27 This detent lever is pivoted at its upper end on the pin 48 extending from the casing wall 12. Between the detent lever and the inner Wall of the casing is the cam bar 49 which is held against 7 the wall 12 by the'heads of the screws 50, the screws passing thru the elongated openings 51 in the bar to thus provide for limited up and down shift of the bar. At its lower end the cam bar has the extension 52 with the inclined wedge surface 53 which engages,

against the correspondingly inclined inner edge 54 of the detent lever 46. At its upper end the detent lever has the tongue 55 which extends into the space between the heel of the extension 52 and the abutment extension 56 on the cam bar. At its upper end the cam bar 49" has the lateral arm 57 extending therefrom whose upper side is engaged by thecompression spring 58secured to the upper wall of the casing, 10. This spring tends to hold the cam bar down with its wedge surface 53 against the surface 54 of the detent-l'ever and with its abutment 56 againstthe tongue 55- of the lever to thus hold the lever; with'its end 6 engagingin the notch 47 to prevent turning of the cam hub 27 by the outer door knob 35. When the cam bar is raised the detent lever will be released and eventually the heel it of the extension 52 will engage with the tongue 55 and swing the detent lever to rel-ease its end 6 from the notch 47. As a means for raising the cam bar,'I provide the cam foot 59 which extends from the sleeve 60 suitably journaled at its upper and lower ends in the walls 12 and 12 of the lock casing. The sleeve has an opening for receiving the polygonal stem 61 ex tending from the finger lever 62 located on the inside of the door so that the occupant may release the locking mechanism at will to permit turning of the outer door knob and entrance into the room without the use of a key. The cam foot is normally held against the abutment pin 63 as clearly shown in Fi g. 1 and when the thumb lever is turned the foot swings around and engages against the under side of the arm 57 of the cam bar to raise the cam bar and effect the desired release of the latch lever 46 to permit opening of the door from the outside by means of the outer door knob 35. The inner door knob 34 is always free to be turned to efiect outward. shift of the locking bolt and opening of the door.

I also provide means for unlocking the door from the outside by means of a key. A look barrel 64' extends thru the outer escutcheon plate 4:3 and extends into the lock casing through the threaded flange 64 on thewall 12. A set screw 65 threading through the lugs 66 engages in the notch 67 in the lock barrel to secure the barrel rigidly in place after insertion thereof. At its outer end the set screw extends through the escutcheon plate 11 so that release of the lock barrel may be effected when it is desired to remove the barrel; The lock cylin der 68 has the key slot 69 for receiving a suitable key 7 0 in the usual manner, insertion of the key releasing the cylinder for turning movement. Extending from the inner end of the cylinder is the arm 71 which cooperates with the upper end of thelever 72. This lever is pivoted intermediate its ends and as shown it is pivoted on the pin 18 which also pivots the latch lever 46. At its lower end the lever 72 extends between the cam plates 37 and 38 to abut against the inner side of the block 21 so that when the key is turned to swing the arm: 71 the lever 72 will be rotated to cause outward shift of the lock bolt and opening movement of such bolt to permit opening of the door.

In the door frame 73 is secured the socket member 74 which has the escutcheon plate extension 75 secured against the inner edge 1 outer wall 76 which has the passageway 77 for receiving the lock bolt shank at the base of the conical head. Above and below the passageway 7 7 .and at the outer end thereof are the keepers 7 8 and 79 which on their inner sides have cylindrical surfaces for re ceiving the cylindrical outer section 80 of the lock bolt head. The outer faces of the keepers are so beveled and rounded that when engaged by the locking bolt head during closing movement of the door, they will cooperate with the conical surface of the head to draw the bolt outwardly and to guide the head into position behind the inner sides of the keepers where the head will then be locked and the lock bolt prevented from opening movement until positively moved to releasing position by the turn-ing of the door knob or the key 70. When the door is being closed the lock bolt head is drawn into the pocket 74 by engagement with the keepers and when releasedfroin the keepers when the door is closed the lock bolt will be shifted back by its springQO into locking position behind the keepers. To open the door either a knobis turned or the key which results in outward shift of the lock bolt and release of the conical head from the keepers, the door being then free to be swung open. a

It will be noted that with my construction and arrangement the bolt head is entirely on i within the recess 15 when the door is open. 7

and take considerable weight and strain of]:' of the locking bolt. An escutcheon or finish plate 81 may be provided on the inside of the door frame as shown in Fig. 1 to assist in securing the pocket member 74 and its escutcheon extension in place.

I do not desire to be limited to the exact construction, arrangement and operation shown and described as changes are possible which will still come within the scope of the invention.

I claim as follows V In door locking mechanism, the combination of a lock frame, a locking bolt within said frame extending to the exterior thereof and having a locking head at its outer end, means tending to hold said bolt inwardly, a cam member adapted to be rotated into engagement with said locking bar to shift it outwardly, means for controlling said cam member from the exterior of the door lock, there being a notch-Yin said cam member, a latch lever, a slidable cam bar having an 1nclined surface, a spring normally shifting said bar with its inclined surface against said lever to hold the end of said lever in said notch whereby preventing turning of said cam member, and a release member within said lock frame operable from the exterior thereof for engaglng with said bar to shift it to first release itfrom said latch lever and then to cause it to engage with and positively move said latch lever clear of said cam member to thereby permit turning of said cam member.

In witness whereof, I hereunto subscribe my name this 29 day of March A. D., 1924:.

WILLIAM A. LURIE. 

